Device for giving linear measures of fractions.



PATENTEI) OT.31, 1905.

E. P. EOLLET'I. DEVICE FOR GIVING LINEAR MEASURES OF ERAGTIONS.

APPLICATION FILED JAN.'5. 1905.

UNITED STATES PATENT i OFFICE.

DEVICE FOR GIVINGLINEAR MEASURES OF FRACTIONS- Specification of Letters Patent.

:Patented oct. 31, 1905.

Application led January 5, 1905. Serial NoIv 239,813.

T0 all whom, it 1v1/ay concern:

Be it known that I, EDWARD P. FoLLu'rT, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Devices for Giving Linear Measures of Fractions, which improvement is fully set forth in the following speciiication and shown in the accompanying drawings.

. My invention is a mechanical device for quickly and conveniently showing in linear' measures, as upon a scale of equal parts, fractions of fractions and fractions of mixed numbers of any given unit of measure, thereby avoiding tedious and troublesome calculations.

This invention, while applicable for general use in the matter of giving linear measures of fractions, is herewith shown as applied more particularly to the purpose of making corsets.

The invention is hereinafter fully described, and more particularly pointed out in the appended claims, reference being had to the accompanying drawings, which, with the reference characters marked thereon, form a part of this specification.

Figure l is a plan of the device, parts being shown in various positions by full and by dotted lines. Fig. 2, drawn to a larger scale, is a hori- Zontal transverse section of parts on the dotted line 2 in Fig. l seen as indicated by the associated arrow. Fig. 3 shows the head of the graduated swinging or pivotal member enlarged.

In the drawings, F and Gr are two main parts or members of the device, usually made of strips of sheet metal, partly overlapping and joined side by side by a pin a, common to both, so as to turn thereon as a pivot. The member or bar Gr, which may be regarded as the body of the device, is formed with straight parallel edges, the right-hand edge being radial with the pivot-pin a and the bar being graduated at Z) below the pivot, as shown. The division-marks of the scale Z) indicating the units of measure and fractions thereof extend transversely of the bar, the unit-marks being numbered in regular order downward from the pivot-pin a. These units of measure maybe of any length convenient or as may be required for any `particular work, those shown on the part G being' commonly three-fourths of an inch subdivided into halves and fourths, as shown. The broad bar or pivotal member F of the device is marked also with a series of curved scales I, (designated A B C D E, respectively,) concentric with the pin a, each scale being formed of a series of unequally-spaced radial marks c, numbered in the various scales from unity to l0, 9, 8, 7, 6, respectively, as clearly shown in Fig. 3.

H in the drawings is a graduated bar formed with a clamp-head d, adapted to hold upon and slide in vertical directions along the body (ir, so as to occupy different positions thereon, as indicated in Fig. l. The bars G and H are at right angles with each other, the latter being graduated, as in inches and fractions thereof, beginning at the adjacant edge of the bar or body Gr, the latter, with said sliding member H and the pivotal member F, carried by the body Gr, coacting to produce the results required.

The edge of the pivotal member F adjacent to the body Gr is radial below the pivot a, and in using the device the linear distance sought in every case is found ou the scale of the bar H, reading from the right-hand edge of the body ir to the opposing radial edge of the pivotal member F. If it be wished, for example, to obtain by this device in inches and fractions thereof two-sevenths of eight and one-half inches, the sliding bar H would be adjusted to 8:15 on the body Gr and the pivotal bar F turned on the pin a to bring the scale-mark 2 of scale D, ending with 7, to coincide with the adjacent edge of the body G. The left radial edge of the bar F would then indicate on the bar H two and threeseventh inches, the linear distance required, or if iive-ninths of thirteen be needed the bar H would be set at. 18 on the body G and the bar F turned to cause the mark 5 of scale B, ending with 9 thereon, to coincide with the edge of the body Gr, when adistance of seveu and two-ninths would be indicated on the bar H as that required. Thus scale measurements in linear distances corresponding` to awkward compound fractions and to fractions of whole and mixed numbers may be readily and accurately obtained by means of this device.

In -contemplating the curved scales I in every case the figure of the scale at the edge of the body Gr when set must be regarded as the numerator of a vulgar fraction and the terminal figure or number of the scale as the denominator-that is to say, if, for example, 2 of scale A be regarded, it means twotenths of some distance indicated by the scale on the body Gr, or, likewise, A on scale D would mean four-sevenths of some measure on scalebof the body Gr. It will be observed,

further, that the length of the unit of measure IOO IIO

marked on the body G is immaterial and only a matter of convenience and is wholly independentof the length of ascale unit of the sliding bar I-Lit being only necessary that the scale be regarded and read in the same termsinches, feet, yards, &c.-as the scale marked upon the bar H. Regarding the position ot' the bar F shown in dotted lines in Fig. l, it is set to indicate one-third of six inches, the scale-mark on the bar H, numbered 2and indicated by the radial edge otl the bar F, being' two inches from the body G, and this wholly without regard to the distance the scale-mark numbered 6 on the body G is away from the aXial point a. It the scalemarked on the bar H be a scale of leet or otl yards or other intervals, the device as set would give the distance of one-third ot' a foot, yard, 85e., with the same accuracy, and in determining` this position ot' the bar F it may be turned either to the scale-mai'k 3 of scale B, one-third of nine, or to 2 of scale E, two-siXths of siX, these two marks being in the same imaginary radial line, and what is true of 6 on the scale 7) is true ot' every other number on the scale. If the slide-bar H were, for eX- ample, set at 13 on the body Gr, as shown by dotted lines, the device would give onethird of thirteen upon the bar H, measured between the opposing' edges of the members Gr and F.

It is clear that the curved scales I may be continued both outward from the center t and inward toward said center should a greater number of scales be needed in applying` this device to different kinds of work and that the members F G H may be made of any length required.

In the device herewith shown the contour e of the bar F is that required tor the curved seams ot' corsets.

That claim as my invention, and desire to secure by Letters Patent, isn

l. A device for g'iving' linear measures otl fractions, consisting' oi' coacting parts, one having a broadened end with curved scales concentric with tlie pivot or' the parts, two ot' said parts having pivotal motion upon each other and two being adapted to slide upon each other, one of said sliding' parts being disposed in a plane between the two pivotal pai'ts.

2. A device for giving' linear measures of fractions, consisting of coaeting parts, one having' a broadened end with curved scales concentric with the pivot of the parts, two of said parts having pivotal motion, two ot' said parts being adapted to slide upon each other, and two of the parts crossing each other at varying acute angles, one ot' said sliding parts being disposed between two pivotal pai'ts and entirely disconnected from one of the latter.

3. A device for giving linear measures of fractions, having two parts pivotally joined, one part having a broadened end with curved scales concentric with the pivot ot' the parts and two of said parts adapted to slide upon each other, the sliding parts being' disposed at right angles and one ot' said sliding parts being' disposed between the pivotally-niovable parts and entirely disconnected from one of them, a sliding part and a pivotal part crossing' each other to forni an angle.

4. A device for giving it'ractions ot linear units, consisting of a main pai't or body, a part having pivotal motion on said body one having a broadened end with curved scales concentric with the pivot ol the parts, and a pai't adapted to slide on said body, said pivotal part and said slidable part crossing cach other and the sliding part being' interposed between the body and the pivotal pai't an'd entirely disconnected from the latter.

5. A device for giving 'fractions ol:l lineal' units, consisting of two parts pivot-ally joined and two parts held to slide upon each other, a pivotal part and a sliding part crossing to form angles, said sliding' part being iiitei'- posed between the two pivotal parts the adjacent edges of the pivotal parts being radial.

6. A device for giving' linear measures ol'l fractions, having two parts marked with scales and pivotally joined, and two parts adapted to slide upon each other and marked with scales of equal parts, said sliding' part being' interposed between the two pivotal parts a sliding' part and a pivotal part crossing cach other to `form an angle.

7. A device of the kind described, having` two members pivot-ally joined one being provided with a portion extended beyond the pivot marked with a curved scale in position to coact with the other member, said scale being concentric with the pivot otl the two parts and two parts held to slide upon each other one havinga scale ot' equal pai'ts, the member with curved scale indicating' distances on said scale ot equal parts as said member is set by its curved scale.

8. A device of the kind described, consisting' of three coacting parts, two having` pivotal motion upon each other, and two adapted to slide upon each other, all the parts being' marked with scales and the edge ol a pivotal part extended beyond the pivot and being curved, said scale being' concentric with thc pivot ot' the parts.

In witness whereolI I have hereunto set my hand, this 3d day oiE January, 1905, in the presence of two subscribing witnesses.

EDWARD I). FOLLE'II.

INitnesses:

ENos B. IVHITMORE, MINNIE SMITH.

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